[riot-notifications] [RIOT-OS/RIOT] nrfusb: Check chip revision before enabling (#12178)

Koen Zandberg notifications at github.com
Fri Sep 6 10:06:57 CEST 2019

### Contribution description

Engineering sample A doesn't have a functional USB peripheral (errata
issue 94). This commit adds an assertion check for this revision to
prevent some developer headaches.

### Testing procedure

Find an engineering revision A board and flash `examples/usbus_minimal` on it. It should throw an assertion failure on boot. It must not throw an assertion failure on any other version.

### Issues/PRs references

You can view, comment on, or merge this pull request online at:


-- Commit Summary --

  * nrfusb: Check chip revision before enabling

-- File Changes --

    M cpu/nrf52/periph/usbdev.c (3)

-- Patch Links --


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